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Happy 25th Anniversary to the Hubble Space Telescope, which has rightly been called one of the most important scientific tools in human history. It has brought the cosmos closer to us, just as it has helped to drive home an understanding of precisely how far away those twinkling lights in the sky actually are … and connected to that, just how old our universe is:
The depth of Hubble’s data, however, has touched or rewritten nearly every area of astrophysics. Ever since the discovery of the expanding universe in the 1920s, astronomers had struggled with the rate of expansion and what it means. The so-called Hubble constant, the universal rate of expansion, was much in doubt, with two factions arguing very different conclusions from the data. The Hubble constant is also inversely proportional to the age of the universe, another key holy grail of science. One of the primary goals of Hubble was to measure the Hubble constant accurately, using a variety of distance indicators, and by the turn of the 21st century, this helped define a relatively accurate Hubble constant of 72±8 and an age of the universe, which the more recent European Planck satellite has refined further to 13.8±0.04 billion years.
It’s an amazing piece of technology.
But I can’t help remembering that even as amazing as it is, a few years ago it was revealed that it was considered so … obsolete … that US spy agencies had just given NASA two other surplus Hubble-type instruments they no longer wanted to bother to store. As I noted at the time:
…we’ve just found out that what we thought was at the limits of our technology is so obsolete that it can be handed off as so much surplus junk. And the implication is that while NASA is currently without the means to launch and service something like Hubble, that there are plenty other agencies within our government which are not so inconvenienced.
Which brings me around to the title of this blog post. Monty Python fans may recognize it from this scene in the Holy Grail:
Which I just happened to watch this week, and snickered over, remembering the news item about the HST from 2012. Though of course, in this case I hope that the National Reconnaissance Office wasn’t *quite* so taunting of NASA …
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